code: def is_number(v):
      return is_int(v) or is_float(v)
  
file_path: lets-plot/python-package/lets_plot/_type_utils.py
imports: import json
  import math
  from datetime import datetime
  from typing import Dict
label_desc: Use image node_id 6 for calling a global function with example usage: is_number(v) and returns: unknown